Georgius Agricola De re metallica, tr. from the 1st Latin ed. of 1556, with biographical introduction, annotations and appendices upon the development of mining methods, metallurgical processes, geology, mineralogy & mining law, from the earliest times to the 16th century, by Herbert Clark Hoover ... and Lou Henry Hoover .. : v.2
Agricola, Georg, 1494-1555
England: The Mining magazine, 1912 1912
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